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Valve gets pressured by payment processors with a new rule for game devs and various adult games removed
(www.gamingonlinux.com)
Steam may now remove "content that may violate the rules and standards set forth by Steam’s payment processors and related card networks and banks, or internet network providers. In particular, certain kinds of adult only content."
So far there has been a crackdown on incest games.
Recently in the news, payment processors forced Fansly to ban substance use, furry content, hypnosis, and more. So I'm sorry 
and 
gang but I implore you to do some critical thinking and read history. There will sadly have to be a queer/pervert united front.
Apparently this wasn't Steam or Visa randomly deciding to do this. They were lobbied by an Australian NGO to remove SA and Incest material:
https://www.collectiveshout.org/
Steam wouldn't remove SA games so they went to the payment processors and complained until those companies put pressure on Valve.
Or they're just taking credit for something that was already happening. Hard to tell.